On 02/22/2017 06:41 AM, Jiaqi ZHANG wrote:
Soluiton2 is fine. For Solution1, I checked the result with MATLAB, the
contour plot is right.
I also follow your instruction and tried data_out.build_patches(2).

Try build_patches(6) or build_patches(10).

As I stated, (i) what you output is not what is used internally in deal.II, and (ii) what Visit plots is not what you output. But with higher arguments to build_patches, you get closer in both regards.

Best
 W.


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Wolfgang Bangerth          email:                 bange...@colostate.edu
                           www: http://www.math.colostate.edu/~bangerth/

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